In this paper, we investigate how a person visually perceives oral speech by observing the speaker’s articulation. We consider the features of spontaneous Russian speech. We describe possible barriers to visual perception. We focus on situations when reservations are present in oral spontaneous Russian speech. We indicate the reasons for reservations to emerge and the consequences we face as we accept the reservations. We present tour study of how reservations in oral colloquial speech are formed and perceived. We give examples of possible combinations of phoneme permutations in words using the material of our developed corpus of homovisemes. All words with similar visemes are defined for a given utterance component. We investigate the distinctive features of how we phonetically and visually recognize spontaneous oral speech in terms of how phonemes change in order in words.